Change my account status to student

Hi, evereyone! I ve been paying the individual plan since may 2019 but recently my univesity has given the students the posibility to use an institutional mail. I d like to change my account status to student so i can pay a little bit less 😉 . Does anyone know if i can cancel my individual plan and start using the student one without paying the extra amonut of money for cancelling the individual plan earlier?

Sorry for the gramatical mistakes hehe. Im not an english speaker.

Thanks to y´all.